[HTC Flyer, EVO View 4G] cyko:
Been there, done that, posted in another thread.... save you a moment or two.

My Hong Kong Flyer P510e 3G/32GB --- HBOOT: 1.10.000 --- ROM: 1.48.708.3 was able to S-OFF via Revolutionary after upgrading the system software. Here is what I did.

#1 You need to update to SW Version 2.00.405.3 from RUU_Flyer_HTC_WWE_2.00.405.3_R_Radio_20.3501.30.08 9BU_3809.05.04.10_M_release_194964_signed.exe which you can download via this link. It's about 517 MB

#2 Once you get that file, unplug your Flyer from your computer and then double click to run the utility. Somewhere buried in your user account folder will be an image file created by the update utilty. You need the image, do not plug your flyer in and try to update it. In my case, the image file was buried in C:\Documents and Settings\MyAccount\Local Settings\Temp\{0E03141E-27B1-4E3A-B9B9-18DA9C1FCBEC}\{50F2F878-636A-496F-A7CB-544C067E0C4B} and was named ROM.zip Hunt around that Temp directory, you should be able to find it.

#3 I renamed ROM.ZIP to PG41IMG.zip.

#4 You need an extra SD Card to make a "Goldcard". A Goldcard is a special SD card that lets you flash ROMs on S-ON devices.

#5 Put the memory card you want to use for the Goldcard into your Flyer.

#6 With the memory card in your Flyer, click on Settings, SD and Phone storage, then click Unmount SD card. Once it unmounts, click Format SD card. (Please keep in mind that some memory cards don’t work, and this will erase all data on your SD Card so back all the data up first to your computer)

#7 On the Flyer, go to Settings, Applications, Development and then make sure USB Debugging is checked.

#8 Download "GoldCard Helper" from the Android Market and open it.

#9 Get the code for mmc2 (mmc2 is the external memory card of your Flyer), go to the website shown on the GoldCard Helper screen and follow the directions to get your Goldcard image.

#10 Download the HxD Hex editor from http://mh-nexus.de/en/hxd/

#11 Take your SD card out of your Flyer and put it into a SD card reader. Plug the reader into your PC so it shows up on your computer as Removable Disk.

#12 Open the Hex Editor (Run as Administrator if you're on Vista or Windows 7) and click on the Extra tab, then click on Open Disk. Under Physical Disk select Removable Disk (your SD card you just put into the computer). Make sure to UNcheck Open as ReadOnly. Click OK.

#13 Goto the Extra tab again and click Open Disk Image. Open up the goldcard.img that you saved from your email. You should now have two tabs, one is the SD card (Removable Disk) and the other is the goldcard.img Press OK when prompted for Sector Size 512 (Hard Disks/Floppy Disks).

#14 Click on the Goldcard.img tab and click on the Edit tab and click Select All. Then click on the Edit tab again and click Copy.

#15 Click on the Removable Disk tab (Your SD Card) and select offset 00000000 to 00000170 then click on the Edit tab and click Paste Write.

#16 Click on File then click Save.

#17 Close the Hex Editor.

#18 Test the card. Take it out of the computer, then put it back in. Try to open the memory card on the computer (Removable Disk), if it lets you, you are all set.

#19 Copy the PG41IMG.zip file onto your new Goldcard.

#20 Put the Goldcard into your Flyer and boot holding the volume down key.

#21 Update the ROM (takes about 5-10 minutes) You should now have SW Version 2.00.405.3

#22 Go to globaltron's thread and follow the instructions outlined by globaltron.

You should now have a S-OFF device with CWM and Root

Enjoy